Title (en)

INTERFRAME ADAPTIVE VECTOR QUANTIZATION ENCODING APPARATUS AND VIDEO ENCODING TRANSMISSION APPARATUS

Publication

EP 0433268 A3 19910710 (EN)

Application

EP 91102308 A 19860226

Priority

• JP 3935185 A 19850228
• JP 4612085 A 19850308
• JP 7209485 A 19850405
• JP 7774185 A 19850412
• JP 21732085 A 19850930

Abstract (en)

[origin: EP0433268A2] In an interframe adaptive quantization apparatus to perform efficient encoding of video signals using vector quantization method, analogue signals are converted into digital signals, the digital signals are subjected to cos conversion and normalization thereby an input vector is formed, the quantization apparatus comprising a vector quantization member including a code table memory for performing vector quantization of the input vector subjected to the cos conversion normalization, a code table updating member where a group of the input vectors of cos conversion normalization quantized into the same index in the vector quantization member are added and averaged and written as new set of output vectors of cos conversion normalization in the code table memory, and a normalization restoration inverse cos conversion member for performing reverse processing to the cos conversion normalization member. <IMAGE>

IPC 1-7

H04N 7/137

IPC 8 full level

G06T 9/00 (2006.01); H04N 7/28 (2006.01); H04N 7/32 (2006.01); H04N 7/36 (2006.01); H04N 7/60 (2006.01); H04N 11/04 (2006.01); H04N 19/94 (2014.01); H04N 21/236 (2011.01); H04N 21/434 (2011.01)

CPC (source: EP US)

G06T 9/008 (2013.01 - EP US); H04N 11/042 (2013.01 - EP US); H04N 19/152 (2014.11 - EP US); H04N 19/503 (2014.11 - EP US); H04N 19/94 (2014.11 - EP US); H04N 21/236 (2013.01 - EP US); H04N 21/434 (2013.01 - EP US); H04N 19/50 (2014.11 - EP US)

Citation (search report)

• [A] EP 0097858 A2 19840111 - MITSUBISHI ELECTRIC CORP [JP]
• [A] US 4210927 A 19800701 - FURUHATA TAKASHI [JP], et al
• [A] US 4015286 A 19770329 - RUSSELL JAMES T
• [AP] US 4541008 A 19850910 - FISHMAN MAX [US], et al
• [A] IEEE Transactions on Communications, Vol. COM-25, No. 11, November 1977, New York, WEN-HSIUNG CHEN et al.: "Adaptive Coding of Monochrome and Color Images", pages 1285-1292.

Designated contracting state (EPC)

CH DE FR GB IT LI NL

DOCDB simple family (publication)

EP 0433268 A2 19910619; EP 0433268 A3 19910710; AU 5415386 A 19860904; AU 579452 B2 19881124; CA 1289656 C 19910924; DE 3685238 D1 19920617; EP 0193185 A1 19860903; EP 0193185 B1 19920513; EP 0632656 A2 19950104; EP 0632656 A3 19950308; US 4710812 A 19871201

DOCDB simple family (application)

EP 91102308 A 19860226; AU 5415386 A 19860227; CA 502755 A 19860226; DE 3685238 T 19860226; EP 86102495 A 19860226; EP 94115105 A 19860226; US 83326986 A 19860228